body {
  min-width: 320px;
  max-width: 750px;
  width: 10rem;
  margin: 0 auto !important;
  line-height: 1.5;
  font-family: Arial, Helvetica, STHeiTi, sans-serif;
  background: #f2f2f2;
  color: #333;
}
article,
aside,
blockquote,
body,
button,
code,
dd,
dialog,
div,
dl,
dt,
fieldset,
figure,
footer,
form,
h1,
h2,
h3,
h4,
h5,
h6,
header,
hgroup,
input,
legend,
li,
nav,
ol,
p,
pre,
section,
td,
textarea,
th,
ul,
a {
  margin: 0;
  padding: 0;
}
a {
  color: #333;
  text-decoration: none;
}
i {
  font-style: normal;
}
ul,
ol {
  list-style: none;
}
@media screen and (min-width: 750px) {
  html {
    font-size: 75px!important;
  }
}
